Hostname: page-component-745bb68f8f-b6zl4 Total loading time: 0 Render date: 2025-01-15T12:46:36.928Z Has data issue: false hasContentIssue false
  • English
  • Français

Chemical Effects of Shear Alfvén Waves in Molecular Clouds

Published online by Cambridge University Press:  07 August 2017

S.B. Charnley  and
W.G. Roberge
S.B. Charnley
Affiliation:
Space Science Division, NASA Ames Research Center, California 94035. Physics Department, Rensselaer Polytechnic Institute, New York 12180.
W.G. Roberge
Affiliation:
Physics Department, Rensselaer Polytechnic Institute, New York 12180.

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We consider the propagation of low-amplitude MHD waves in partially-ionised plasmas. Ion-neutral drift (ambipolar diffusion) can lead to significant variations in the deuterium fractionation ratios of several molecules (e.g. HCO+ and N2H+) on spatial scales of between a few hundredths and a few tenths of a parsec, depending upon the fractional ionisation of the plasma. It is possible that interstellar Alfvén waves could be detected by molecular spectroscopy and that these waves may produce other small-scale abundance gradients in molecular clouds.

Type
Diffuse, Translucent and High-Latitude Clouds
Information
Symposium - International Astronomical Union , Volume 150: Astrochemistry of Cosmic Phenomena , 1992 , pp. 155 - 156
Copyright
Copyright © Kluwer 1992 

References

REFERENCES

Bell, M.B. et al. 1988, Ap.J. , 326, 924.CrossRefGoogle Scholar
Charnley, S.B. & Roberge, W.G. 1991a, in Molecular Clouds , eds. James, R.A. & Millar, T.J., Cambridge, p.247 Google Scholar
Charnley, S.B. & Roberge, W.G. 1991b, in preparation. Google Scholar
Draine, B.T. 1986, M.N.R.A.S. , 220, 133.CrossRefGoogle Scholar
Elmegreen, B.G. 1979, Ap.J. , 232, 729.CrossRefGoogle Scholar
Guélin, M., Langer, W.D. & Wilson, R.W. 1982, Astr. Ap. , 107, 107.Google Scholar
Millar, T.J., Bennett, A. and Herbst, E. 1989, Ap.J. , 340, 906.Google Scholar
Pineau des Forêts, G., Roueff, E. & Flower, D. 1989, M.N.R.A.S. , 240, 167.Google Scholar
Roberge, W.G. & Hanany, S. 1991, Ap.J. , , submitted.Google Scholar
Zweibel, E.G. & Josafatsson, K. 1983, Ap.J. , 270, 511.CrossRefGoogle Scholar